cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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namespaces.h (1919B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 *
      4 * Copyright (C) 2017 Hari Bathini, IBM Corporation
      5 */
      6
      7#ifndef __PERF_NAMESPACES_H
      8#define __PERF_NAMESPACES_H
      9
     10#include <sys/types.h>
     11#include <sys/stat.h>
     12#include <linux/stddef.h>
     13#include <linux/perf_event.h>
     14#include <linux/refcount.h>
     15#include <linux/types.h>
     16
     17#ifndef HAVE_SETNS_SUPPORT
     18int setns(int fd, int nstype);
     19#endif
     20
     21struct perf_record_namespaces;
     22
     23struct namespaces {
     24	struct list_head list;
     25	u64 end_time;
     26	struct perf_ns_link_info link_info[];
     27};
     28
     29struct namespaces *namespaces__new(struct perf_record_namespaces *event);
     30void namespaces__free(struct namespaces *namespaces);
     31
     32struct nsinfo {
     33	pid_t			pid;
     34	pid_t			tgid;
     35	pid_t			nstgid;
     36	bool			need_setns;
     37	bool			in_pidns;
     38	char			*mntns_path;
     39	refcount_t		refcnt;
     40};
     41
     42struct nscookie {
     43	int			oldns;
     44	int			newns;
     45	char			*oldcwd;
     46};
     47
     48int nsinfo__init(struct nsinfo *nsi);
     49struct nsinfo *nsinfo__new(pid_t pid);
     50struct nsinfo *nsinfo__copy(const struct nsinfo *nsi);
     51
     52struct nsinfo *nsinfo__get(struct nsinfo *nsi);
     53void nsinfo__put(struct nsinfo *nsi);
     54
     55bool nsinfo__need_setns(const struct nsinfo *nsi);
     56void nsinfo__clear_need_setns(struct nsinfo *nsi);
     57pid_t nsinfo__tgid(const struct nsinfo  *nsi);
     58pid_t nsinfo__nstgid(const struct nsinfo  *nsi);
     59pid_t nsinfo__pid(const struct nsinfo  *nsi);
     60pid_t nsinfo__in_pidns(const struct nsinfo  *nsi);
     61
     62void nsinfo__mountns_enter(struct nsinfo *nsi, struct nscookie *nc);
     63void nsinfo__mountns_exit(struct nscookie *nc);
     64
     65char *nsinfo__realpath(const char *path, struct nsinfo *nsi);
     66int nsinfo__stat(const char *filename, struct stat *st, struct nsinfo *nsi);
     67
     68bool nsinfo__is_in_root_namespace(void);
     69
     70static inline void __nsinfo__zput(struct nsinfo **nsip)
     71{
     72	if (nsip) {
     73		nsinfo__put(*nsip);
     74		*nsip = NULL;
     75	}
     76}
     77
     78#define nsinfo__zput(nsi) __nsinfo__zput(&nsi)
     79
     80const char *perf_ns__name(unsigned int id);
     81
     82#endif  /* __PERF_NAMESPACES_H */